...m a computer into analog audio signals suitable for transmission over PSTN (Public Switched Telephone Network) lines and converts received analog signals back into digital data.Modem = MOdulator + DEModulatorHistorical Evolutio...
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From Landlines and Pagers to Smartphones, Virtual Phones and AI: The Evolution of Mobile Communication Technology in the United States
Mobile & Devices...e This network became known as the Public Switched Telephone Network (PSTN). The PSTN eventually became one of the largest interconnected technological infrastructures ever created. 4. Rotary Dialing Changed Telephone Usage One...